Refactor TouchSelectionDraggableClient APIs

ui/touch_selection/touch_handle_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/touch_selection/touch_handle.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/events/test/motion_event_test_utils.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/touch_selection/touch_handle_orientation.h"
@@ skipping 66 matching lines @@
  public:
   TouchHandleTest()
       : dragging_(false),
         dragged_(false),
         tapped_(false),
         needs_animate_(false) {}
 
   ~TouchHandleTest() override {}
 
   // TouchHandleClient implementation.
-  void OnDragBegin(const TouchSelectionDraggable& handler,
-                   const gfx::PointF& drag_position) override {
-    dragging_ = true;
-  }
-
-  void OnDragUpdate(const TouchSelectionDraggable& handler,
-                    const gfx::PointF& drag_position) override {
-    dragged_ = true;
-    drag_position_ = drag_position;
-  }
-
-  void OnDragEnd(const TouchSelectionDraggable& handler) override {
-    dragging_ = false;
+  void OnDragEvent(const TouchHandleDragEvent event,
+                   const TouchSelectionDraggable& draggable,
+                   const gfx::PointF& position) override {
+    switch (event) {
+      case HANDLE_DRAG_BEGIN:
+        dragging_ = true;
+        break;
+      case HANDLE_DRAG_UPDATE:
+        dragged_ = true;
+        drag_position_ = position;
+        break;
+      case HANDLE_DRAG_END:
+        dragging_ = false;
+      default:
+        NOTREACHED() << "Invalid handle drag event";
+    }
   }
 
   bool IsWithinTapSlop(const gfx::Vector2dF& delta) const override {
     return delta.LengthSquared() < (kDefaultTapSlop * kDefaultTapSlop);
   }
 
   void OnHandleTapped(const TouchHandle& handle) override { tapped_ = true; }
 
   void SetNeedsAnimate() override { needs_animate_ = true; }
 
@@ skipping 568 matching lines @@
   UpdateViewportRect(handle, gfx::RectF(0, 0, 230, 600));
   EXPECT_TRUE(drawable().mirror_vertical);
   EXPECT_TRUE(drawable().mirror_horizontal);
 
   UpdateViewportRect(handle, kDefaultViewportRect);
   EXPECT_FALSE(drawable().mirror_vertical);
   EXPECT_FALSE(drawable().mirror_horizontal);
 }
 
 }  // namespace ui